import { IDexHelper } from '../../dex-helper';
import { Logger } from '../../types';
import { NativeRateFetcherConfig } from './types';
export declare class RateFetcher {
    private dexKey;
    private dexHelper;
    private logger;
    private orderbookFetcher;
    private blacklistFetcher;
    private orderbookCacheKey;
    private orderbookCacheTTL;
    private setBlacklist;
    constructor(dexKey: string, dexHelper: IDexHelper, logger: Logger, config: NativeRateFetcherConfig);
    start(): void;
    stop(): void;
    fetchOnce(): Promise<void>;
    private fetchAllBlacklistPages;
    private handleOrderbookResponse;
    private handleBlacklistResponse;
}